Hand-held power tool

Abstract

The invention relates to a hand-held power tool (100) having a drive unit (111), wherein the drive unit (111) can be actuated by means of at least one hand switch (128), a control unit (170) for at least controlling the drive unit (111), wherein the control unit (170) has a control unit housing (174), at least one user interface (200), wherein the user interface (200) comprises at least one operating element (202), and a housing (110), wherein the housing (110) at least partially receives the control unit (170) and the user interface (200). It is proposed that the hand-held power tool (100) has a positioning device (300), wherein the user interface (200) is supported on the control unit housing (174) in the event of use of the positioning device (300).

Description

Technical Field

[0001] This invention relates to a handheld machine tool. Background Technology

[0002] A handheld machine tool is known from the prior art, having a drive unit, a housing, and at least one user interface. The drive unit is operable by means of at least one manual switch. The user interface includes at least one operating element. Summary of the Invention

[0003] This invention relates to a handheld power tool comprising: a drive unit operable by means of at least one manual switch; a control unit for controlling the drive unit, wherein the control unit has a control unit housing; at least one user interface including at least one operating element; and a housing that at least partially receives at least the control unit and the user interface. The invention proposes that the handheld power tool has a positioning device, wherein the user interface is supported on the control unit housing when the positioning device is used.

[0004] This invention provides a compact handheld power tool in which a positioning device is provided to support the user interface on the control unit housing. This invention particularly enables the handheld power tool to achieve a small base height for the housing.

[0005] Handheld machine tools can be configured as electrically operated or pneumatically operated handheld machine tools. Electrically operated handheld machine tools can be configured as either grid-connected or battery-operated handheld machine tools. For example, handheld machine tools can be configured as screwdrivers, compressed air screwdrivers, drilling screwdrivers, rotary impact screwdrivers, hammers, hammer drills, compressed air rotary impact screwdrivers, or impact drilling screwdrivers.

[0006] The drive unit is configured to be operable via a manual switch. If the manual switch is operated by the user, the drive unit is turned on and the handheld machine tool begins operation. If the user ceases operation of the manual switch accordingly, the drive unit is turned off. Preferably, the drive unit is electronically controllable and / or adjustable, enabling reversible operation and pre-setting a desired rotational speed. Alternatively, the manual switch may be lockable, capable of being locked in at least one position under at least one operating state. During reversible operation, the drive unit can switch between right-hand and left-hand rotation directions. To enable the drive unit to switch during reversible operation, the handheld machine tool may have a rotation direction switching element, particularly a rotation direction switching switch.

[0007] The drive unit includes at least one drive motor and may have at least one transmission mechanism in one embodiment. The drive motor may in particular be configured as at least one electric motor. The transmission mechanism may be configured as at least one planetary gear transmission mechanism, wherein the transmission mechanism may, for example, be switchable. In a switchable transmission mechanism, switching between at least two gears can be performed by means of at least one gear shifting element, in particular a gear shifting switch. The invention can also be applied to other motor types or transmission mechanism types. Additionally, the handheld machine tool includes a power supply device, wherein the power supply device is configured for battery operation using a battery, in particular a handheld machine tool battery pack, and / or configured for grid operation. In a preferred embodiment, the power supply device is configured for battery drive. Within the scope of the invention, "handheld machine tool battery pack" should be understood as a combination of at least one battery cell and a battery pack housing. The handheld machine tool battery pack is advantageously configured to power commercially available, battery-operated handheld machine tools. The at least one battery cell can, for example, be configured as a lithium-ion battery cell with a rated voltage of 3.6V. For example, a handheld power tool battery pack may include up to ten individual battery cells, although other numbers of individual battery cells may also be considered. The implementation of battery-powered handheld power tools and the operation of grid-powered handheld power tools are well known to those skilled in the art, therefore details of the power supply will not be discussed here.

[0008] Handheld machine tools may have an impact mechanism. This impact mechanism generates high torque peaks during operation to loosen or secure fixed connecting devices. The impact mechanism can be connected to a drive motor via a transmission mechanism. The impact mechanism can be configured as, for example, a rotary impact mechanism, a locking impact mechanism, a rotating impact mechanism, or a hammer impact mechanism.

[0009] Handheld power tools may have a tool receiver for receiving inserted tools. The tool receiver may be configured as an internal tool receiver, such as a bit receiver, an external tool receiver, such as a socket receiver, or a drill chuck. The tool receiver can receive inserted tools, such as screwdriver bits or socket wrenches, thereby allowing the user to establish a helical connection between the fixing element and the fixing carrier.

[0010] The control unit of the handheld machine tool is at least configured to control a drive unit. Here, the control unit may receive a switching signal generated by a manual switch. It is conceivable that the control unit processes the manual switch switching signal before transmitting the switching signal to the drive unit for control. Furthermore, the control unit is configured to receive, process, and output user interface signals from the user interface. The control unit processes the user interface signals into at least one output signal and outputs that output signal. The output signal can then be sent to the user interface and / or used to control and / or regulate the drive unit. The control unit may include at least one microprocessor or microcontroller.

[0011] The handheld machine tool has a user interface with operating elements. Specifically, the user interface is arranged on the housing. The user interface can be the interface between the user and the handheld machine tool. The operating elements are configured to receive user input. Advantageously, the operating elements are used to set at least one operating mode, especially a speed level, and / or at least to control and / or adjust the work position lighting unit. It is conceivable that the operating elements can also be used to set operating modes that can be specified by the user. Furthermore, the operating elements can also be used to set other operating modes that are meaningful to those skilled in the art.

[0012] The user interface may include a work position lighting unit. The work position lighting unit includes a lighting device and a light guide element. The work position lighting unit is configured to emit light. Furthermore, the light is preferably emitted to the work position area located directly in front of the handheld machine tool. Here, illumination of the work position area and the inserted tool can be achieved. For example, the lighting device may be at least one LED. The lighting device emits light. The light guide element is configured to guide the light. Furthermore, the light guide element is configured to refract the light and guide it to the work position area. Preferably, the light guide element can be configured as a light focusing element, in particular a focusing lens. It is conceivable that the lighting device and the light guide element are integrally constructed such that, in one embodiment, at least one LED is configured as a light focusing element, in particular a focusing lens.

[0013] The user interface can convert user input into user signals, particularly electrical ones. The user interface can then transmit these user signals to the control unit. Furthermore, the user interface can also display information using at least one display element. Advantageously, the user interface has a display element. The display element is configured to display at least one piece of information regarding operating status, operating mode, and / or operating information. The display element can be configured as a lighting device and / or a display, or as other display elements that will be meaningful to those skilled in the art. In one embodiment, the display element may include three LEDs for displaying rotational speed levels.

[0014] Operating status can be, for example, "on" or "off". Operating mode can be, for example, at least one speed, at least one speed level, or at least one impact energy. Examples of operating information are "paired with electrical appliance", "connected to electrical appliance", "not connected to electrical appliance", or at least one battery charging status. Furthermore, other examples of operating status, operating mode, and / or operating information that may be meaningful to those skilled in the art are also possible.

[0015] In one embodiment, the user interface includes at least one additional operating element. Similar to the operating element, this additional operating element can be used to at least set at least one operating mode, particularly setting the speed level, and / or at least to control and / or adjust the work position lighting unit. Here, the control element and / or additional control elements can turn the work position lighting unit on or off, and continuously or progressively increase or decrease the lighting power, particularly the brightness.

[0016] An operating element is a user-operable element through which the user can at least change the operating state, operating mode, and / or operating information. The operating element may be configured as at least one pressing element, at least one pushing element, at least one rotating element, or at least one flipping element. Other embodiments of the at least one operating element are also contemplated. The at least one pressing element is configured for being pressed by the user. The at least one pushing element is configured for being pushed by the user. At least one rotating element is configured for being rotated by the user. The at least one flipping element is configured for being flipped by the user. Depending on the embodiment, combinations of the operating elements are also possible.

[0017] In one embodiment, the operating element and / or other operating elements have at least one reset element. This reset element is configured to guide the operating element and / or other operating elements to at least one neutral position. This neutral position is characterized by the fact that the operating element and / or other operating elements can be manipulated in the neutral position. In particular, the reset element has at least one reset action, thereby guiding the operating element and / or other operating elements to the neutral position after at least one actuation. Subsequently, the operating element and / or other operating elements are positioned in the neutral position, thereby enabling at least one next actuation. Preferably, the reset element is constructed as at least one spring-like element. This spring-like element may be constructed as a domed spring, a coil spring, a hinged lever, or the like.

[0018] The housing at least partially receives the control unit and the user interface. Here, "at least partially" should be understood as the housing receiving at least a portion of the control unit and the user interface. The housing has at least one receiving portion for the control unit. Here, the receiving portion for the control unit at least partially surrounds the control unit housing. The receiving portion for the control unit is exemplarily configured as a rib. The rib is exemplarily integrally formed with the housing. The control unit housing is at least configured to accommodate the control unit within the housing. The control unit housing may be formed as a shell, cup, disc, or similar form. Furthermore, the housing receives a drive unit and an optional impact mechanism.

[0019] In one embodiment, the housing has at least one power supply holding device, particularly a handheld machine tool battery pack holding device, on which a user interface is arranged. The power supply holding device is specifically configured to hold, particularly receive, a power supply device, particularly a handheld machine tool battery pack. Additionally, the power supply holding device is configured to connect the power supply device, particularly the handheld machine tool battery pack, to the housing in a tool-free detachable manner and to ensure power supply to the handheld machine tool. The power supply holding device and the connected handheld machine tool battery pack form at least one base having at least one support surface. The handheld machine tool can be supported by the base, particularly placed on the support surface. Furthermore, the housing includes a handle. The handle is configured for a user to grip for using the handheld machine tool. The power supply holding device is particularly arranged on the handle.

[0020] The user interface is advantageously arranged on the power supply and retention device. In particular, the user interface is arranged on the power supply and retention device such that the user interface's working position lighting unit can provide as much illumination as possible to the working position area.

[0021] Alternatively, the user interface can be located on the handle, especially in the area of ​​the manual switch, or in the tool receiver.

[0022] The handheld machine tool has a positioning device. The positioning device is configured to support the user interface on the control unit housing. For this purpose, the user interface can be directly and indirectly rested against the positioning device. The positioning device is configured to arrange and maintain the user interface in a relative position relative to the control unit housing. Here, "relative position" should be understood as the relative position of the user interface within the housing relative to the control unit housing, especially its arrangement. The positioning device can arrange and maintain the user interface at a predetermined angle and / or predetermined distance relative to the control unit housing.

[0023] In one embodiment of the handheld machine tool, the positioning device has at least one positioning element configured to arrange the user interface to overlap at least partially with the control unit. The positioning element is configured such that the user interface overlaps at least partially with the control unit housing. Here, "at least partially overlap" should be understood as at least a portion of the user interface overlapping the control unit, particularly the control unit housing. Furthermore, the positioning element is configured to position and maintain the user interface relative to the control unit, particularly the control unit housing. It is conceivable to provide multiple positioning elements, such as two, three, or more than three positioning elements.

[0024] In one embodiment of the handheld machine tool, a positioning element is at least partially engaged with the user interface. This positioning element positions the user interface relative to the control unit, particularly the control unit housing. The user interface may have at least one receiving portion to which the positioning element is at least partially engaged. Here, the positioning element may form a form-locking and / or force-locking connection with the user interface, particularly the receiving portion of the user interface.

[0025] In an alternative implementation, the positioning element may be designed to form a material-locking connection with the user interface.

[0026] In one embodiment of the handheld machine tool, the user interface has a user interface circuit board, wherein the user interface circuit board includes at least one through-opening, and a positioning element is configured to pass through the through-opening. The user interface circuit board is configured to convert user input into user signals. For this purpose, the user interface circuit board may have at least one microprocessor or microcontroller. The user interface circuit board may have at least one switching element and at least one light-emitting element. The switching element may be shaped as a button or switch. The switching element is configured to be actuated by an operating element. It is conceivable that the user interface circuit board has at least one additional switching element. This additional switching element is configured to be actuated by another operating element. The light-emitting element of the working position illumination unit may be arranged on the user interface circuit board.

[0027] The positioning element arranges the user interface circuit board relative to the control unit, particularly the control unit housing, by passing through a through-opening. The user interface circuit board is constructed with this through-opening. This through-opening can be formed, for example, as a recess, a through-hole, or the like. The through-opening can be formed at substantially any location on the user interface circuit board. Furthermore, multiple through-openings can be provided, such as two or three. This through-opening can be constructed as circular, elliptical, polygonal, slit-like, or the like. The through-opening is configured to receive the positioning element in a manner that allows the positioning element to pass through. It is conceivable that the positioning element and the through-opening constitute a form-locking and / or force-locking connection.

[0028] In one embodiment of the handheld machine tool, the user interface has at least one carrier element, wherein the carrier element includes at least one receiving element, and a positioning element engages with the receiving element of the carrier element. The positioning element positions the carrier element relative to the control unit, particularly the control unit housing, by engaging the positioning element into the carrier element. The carrier element has a receiving element, which may be configured as, for example, a recess, opening, notch, slot, or the like. Here, the receiving element may be formed, for example, in a can or shell shape. It is conceivable that the receiving element is integral with the carrier element. The carrier element may have a light guide element for a working position illumination unit, an operating element, and / or additional operating elements. It is conceivable that the light guide element is injection molded through the carrier element. Furthermore, it is conceivable that the display element is injection molded through the carrier element. It is also possible that the operating element and / or additional operating elements are integral with the carrier element. It is conceivable that the carrier element has multiple receiving elements, such as two or three receiving elements.

[0029] The positioning element can form a form-locking and / or force-locking connection with the receiving element of the carrier element. Here, the positioning element can form a connection with the receiving element of the carrier element, such as a snap-fit ​​connection, hook connection, locking connection, screw connection, bayonet connection, or plug-in connection.

[0030] Alternatively, the positioning element and the carrier element can be connected by a material locking mechanism.

[0031] In one embodiment of the handheld machine tool, the positioning element is constructed in a pin-like shape. Here, the positioning element can be formed, for example, as a pin, bar, or similar type. The positioning element can have a cylindrical or polygonal shape.

[0032] For example, two pin-shaped positioning elements can be provided, which pass through two through openings in the user interface circuit board and engage with two receiving elements of the carrier element.

[0033] In this exemplary embodiment, the user interface has a carrier element and a user interface circuit board. Here, the carrier element includes an operating element, additional operating elements, a display element, and a light guide element. The operating elements and additional operating elements are here formed as hinged levers. The display element and light guide element are here injection molded and encapsulated by the carrier element. The user interface circuit board includes a switching element, additional switching elements, and a light-emitting element. Here, the carrier element rests against the user interface circuit board. However, it is conceivable that the carrier element and the user interface circuit board form a form-locking, force-locking, and / or material-locking connection. Furthermore, it is conceivable that the carrier element is inserted into the user interface circuit board. It is possible that the carrier element is supported on the user interface circuit board by additional components, such as seals.

[0034] In one embodiment of the handheld machine tool, the positioning element at least partially surrounds the user interface, particularly the carrier element and / or the user interface circuit board. The positioning element positions the user interface, particularly the carrier element and / or the user interface circuit board, relative to the control unit, particularly the control unit housing, in such a way that the positioning element at least partially surrounds the user interface. Here, "at least partially surrounds" should be understood as the positioning element at least partially surrounding the edge of the user interface and at least partially abutting against the user interface. Here, the positioning element may, for example, form a form-locking, force-locking, and / or material-locking connection with the user interface. It is also conceivable that the positioning element at least partially surrounds the carrier element or the user interface circuit board.

[0035] In one embodiment of the handheld machine tool, the positioning element is configured as a frame that at least partially surrounds the user interface. Thus, the positioning element can position the user interface, particularly the carrier element and / or the user interface circuit board, relative to the control unit, particularly the control unit housing. The frame that at least partially surrounds the user interface can rest against the user interface, particularly against the carrier element and / or the user interface circuit board.

[0036] In one embodiment of the handheld machine tool, the positioning device has at least one support element, wherein the user interface, particularly the carrier element and / or the user interface circuit board, rests against the support element, and the support element is configured to direct any operating force into the housing. The user interface, particularly the carrier element and / or the user interface circuit board, rests against the support element. The support element is configured to receive any operating force and, consequently, to prevent the user interface, particularly the carrier element and / or the user interface circuit board, from bending when operated by the user. The operating force can be generated, for example, by pressing, pushing, pulling, or rotating an operating element and / or other operating elements. The support element is operatively connected to the housing, thereby allowing the support element to direct any operating force into the housing.

[0037] It is possible that the support element is operatively connected to the control unit housing, thereby transferring the operating force to the control unit housing. Alternatively, the control unit housing can be operatively connected to the housing, allowing the operating force to be transferred from the control unit housing to the housing. It is also possible that the control unit housing rests against the housing.

[0038] Support elements can be formed, for example, as circumferential shoulders, circumferential edges, circumferential flanges, tabs, circumferential protrusions, pins, rods, pads, or the like. Multiple support elements can also be provided, such as two, three, four, or five support elements.

[0039] In one embodiment, the positioning element and the support element are constructed integrally. This provides a stable positioning device.

[0040] In one embodiment of the handheld machine tool, the positioning device has an additional positioning element for aligning the user interface, particularly the carrier element and / or the user interface circuit board, relative to a housing opening. The user interface, particularly the carrier element and / or the user interface circuit board, has a connecting element configured to receive the additional positioning element. The housing has a housing opening. The housing opening may be arranged in the base of the housing. The housing opening may, for example, have a circular, elliptical, or polygonal shape. The additional positioning element is configured to align the user interface, particularly the carrier element and / or the user interface circuit board, relative to the housing opening. This additional positioning element can position the user interface, particularly the carrier element and / or the user interface circuit board, relative to the housing opening and additionally relative to the control unit, particularly the control unit housing. This enables the user interface, particularly the carrier element and / or the user interface circuit board, to be aligned relative to the housing opening and additionally relative to the control unit, particularly the control unit circuit board. The additional positioning element may be formed, for example, as a at least partially surrounding edge, at least partially surrounding tab, O-ring, pin, bar, or the like. The connecting element is configured to receive the additional positioning element. Here, the additional positioning element may abut against the connecting element. Furthermore, the connecting element can form a form-locking and / or force-locking connection with the additional positioning element. The connecting element can be formed, for example, as a receiving portion, a recess, an opening, a groove that is at least partially surrounding it, a surface that is at least partially surrounding it, a frame that is at least partially surrounding it, or the like.

[0041] Alternatively or additionally, the housing may be constructed with additional positioning elements. These additional positioning elements may be formed, for example, as a protrusion that at least partially surrounds the user interface, a tab that at least partially surrounds the user interface, or something similar. Then, the connecting elements for the user interface, particularly the carrier element and / or the user interface circuit board, may be constructed as a frame that at least partially surrounds the user interface or a surface that at least partially surrounds the user interface.

[0042] In one embodiment of the handheld machine tool, the positioning device has at least one limiting element, and the control unit includes a control unit circuit board, which rests against the limiting element, and the limiting element is configured to arrange the control unit circuit board relative to the user interface, particularly the carrier element and / or the user interface circuit board. The limiting element can be formed, for example, as a bevel, rib, abutment, surface, tab, pin, pad, edge, flange, shoulder, or the like. The limiting element positions the control unit circuit board relative to the user interface, particularly the carrier element and / or the user interface circuit board, and / or relative to the control unit housing, by resting the control unit circuit board against the limiting element. It is conceivable to provide multiple limiting elements, such as two, three, or four limiting elements.

[0043] As described above, the control unit can receive and process switching signals, user interface signals, and output signals. For this purpose, the control unit has a control unit circuit board. The control unit circuit board may include at least one microprocessor or microcontroller. Here, the control unit includes a control unit housing and a control unit circuit board. The control unit housing receives the control unit circuit board.

[0044] In one embodiment, the support element and the limiting element are integrated. Alternatively, the support element, limiting element, and positioning element can be constructed as a single unit. This provides a stable and compact positioning device.

[0045] In one embodiment of the handheld machine tool, the user interface, particularly the user interface circuit board, is electrically connected to the control unit, particularly the control unit circuit board. The user interface can be electrically connected to the control unit via a plug-in connection, a cable connection, or a solder connection. In the case of a plug-in connection, the user interface, for example, has at least one plug, and the control unit includes at least one connector corresponding to the plug. With the plug and connector connected, the user interface can be electrically connected to the control unit. Alternatively, the user interface can have at least one connector, and the control unit includes at least one plug for wiring. In the case of a cable connection, the user interface and the control unit can be electrically connected via at least one cable. Here, the cable can be soldered to the user interface and the control unit, for example. In the case of a solder connection, the user interface and the control unit can be electrically connected to each other via soldered pins.

[0046] The user interface, particularly the user interface circuit board, has at least one opening for the control unit, particularly the control unit circuit board. The control unit, particularly the control unit circuit board, has at least one pin for the user interface. The pin for the user interface is configured to engage with the opening for the control unit and form an electrical connection. The pin for the user interface can be soldered to the user interface, particularly the user interface circuit board, using the opening for the control unit. It is conceivable that the pin for the user interface, particularly the user interface circuit board, and the opening for the control unit, particularly the control unit circuit board, form a form-locking and / or force-locking connection to electrically connect the user interface to the control unit.

[0047] It is conceivable that the user interface, especially the user interface circuit board, has multiple openings for the control unit, such as two, three, four, or more than four openings. Furthermore, it is conceivable that the control unit, especially the control unit circuit board, has multiple pins for the user interface, such as two, three, four, or more than four pins. Here, the multiple openings for the control unit correspond to the multiple pins for the user interface.

[0048] Possibly, the user interface circuit board can be connected to the control unit circuit board alternatively or additionally via filler. Here, the control unit housing may receive the filler. The filler enables a material-locking connection between the control unit circuit board and the user interface circuit board.

[0049] In one embodiment of the handheld machine tool, the control unit housing constitutes a positioning device. Here, the control unit housing can then be constructed with positioning elements, support elements, and limiting elements. Alternatively, the control unit housing can be integrally constructed with the positioning elements, support elements, and limiting elements. The control unit housing can arrange and hold the user interface, especially the carrier element, and / or the user interface circuit board, relative to the control unit, especially the control unit circuit board, in such a way that the control unit housing constitutes a positioning device. This allows the user interface, especially the carrier element, and the user interface circuit board to be assembled with the control unit, especially the control unit housing, and the control unit circuit board, as a common module during the assembly of the handheld machine tool. This shortens the assembly time of the handheld machine tool and simplifies assembly, while simultaneously achieving a small base height. The advantage of a small base height is that the handheld machine tool can also be used in confined working positions. Furthermore, a low tolerance chain is achieved between the user interface circuit board and the carrier element, because the control unit housing constitutes a positioning device.

[0050] In one embodiment, the housing at least partially protrudes from the user interface. For this purpose, the housing has at least one protrusion, tab, edge, or the like. Here, the housing arranges the user interface, particularly the carrier element and / or the user interface circuit board, between the housing and the control unit, particularly the control unit housing and / or the control unit circuit board. For this purpose, the housing may have at least one compression rib. This compression rib is configured to apply force to the user interface, particularly the carrier element and / or the user interface circuit board, in a direction toward the control unit, such that the user interface can be arranged substantially without gaps within the housing. Therefore, the housing can additionally arrange and position the user interface, particularly the carrier element and / or the user interface circuit board, relative to the control unit, particularly the control unit housing and / or the control unit circuit board. It is conceivable that the user interface, particularly the carrier element, has an operating membrane. The operating membrane may include operating indicators, wherein the operating indicators are configured to display information about the handheld power tool to the user. The information about the handheld power tool may be, for example, the operating mode, speed level, or the like. The housing may protrude from the user interface such that the housing at least partially rests against the operating membrane. It is conceivable that the operating membrane is at least partially recessed into the carrier element.

[0051] In an alternative embodiment, the housing can clamp the user interface to the control unit, particularly the control unit housing, via an operating membrane. Additionally, the operating membrane can reduce friction between the housing and the user interface, particularly the carrier element.

[0052] In an alternative embodiment, the user interface, particularly the carrier element, is configured with a positioning element that engages with a receiving portion of the control unit housing. The user interface, particularly the carrier element, may have the positioning element constructed as, for example, a pin, edge, tab, protrusion, or the like. It is conceivable that the positioning element is integrated with the user interface, particularly the carrier element. The receiving portion of the control unit housing may be constructed as, for example, a shell, can, groove, in the form of an opening, in the form of a recess, or the like. The positioning element may form a form-locking and / or force-locking connection with the receiving portion of the control unit housing to position the user interface, particularly the carrier element, and / or the user interface circuit board relative to the control unit, particularly the control unit circuit board.

[0053] In an alternative embodiment, the housing is configured with a positioning element, which passes through the control unit, particularly the control unit housing and / or the control unit circuit board, and engages with the user interface, particularly the user interface circuit board and / or the carrier element. The housing may be configured with the positioning element as, for example, a pin, an edge, a tab, a protrusion, or the like. It is conceivable that the positioning element may be integral with the housing. The control unit, particularly the control unit housing and / or the control unit circuit board, has at least one through-opening for the positioning element. The positioning element may form a form-locking and / or force-locking connection with the through-opening of the control unit. The positioning element may pass through the through-opening of the control unit, particularly the control unit housing. The user interface here has a through-opening and a receiving portion for the positioning element. The user interface circuit board here has a through-opening. The positioning element is configured to pass through the through-opening of the user interface circuit board. Here, the positioning element may form a form-locking and / or force-locking connection with the through-opening of the user interface circuit board. Here, the carrier element has a receiving portion for the positioning element. The positioning element engages with the receiving portion of the carrier element. The positioning element may form a force-locking and / or form-locking connection with the receiving portion of the carrier element. The receiving portion of the carrier element can be constructed, for example, in the form of a shell, a can, a trough, an opening, a recess, or something similar. Attached Figure Description

[0054] The present invention will now be described with reference to preferred embodiments. The accompanying drawings illustrate:

[0055] Figure 1 A schematic diagram of a handheld machine tool with a user interface according to the present invention;

[0056] Figure 2A three-dimensional partial view of a handheld machine tool with a user interface;

[0057] Figure 3 A cross-sectional view of a user interface having the positioning device according to the present invention;

[0058] Figure 4 A longitudinal cross-sectional view of a user interface having the positioning device according to the present invention;

[0059] Figure 5a A three-dimensional view of the carrier element;

[0060] Figure 5b A perspective view of the control unit housing;

[0061] Figure 5c A perspective view of the control unit circuit board with a user interface circuit board;

[0062] Figure 6a A perspective sectional view of a handheld machine tool with a positioning device, representing an alternative embodiment.

[0063] Figure 6b A perspective view of an alternative embodiment of the positioning device. Detailed Implementation

[0064] Figure 1 A handheld power tool 100 according to the present invention is shown, wherein the handheld power tool is configured herein as an exemplary battery-powered rotary impact screwdriver. The handheld power tool 100 includes a driven shaft 124, a tool receiving portion 150, and an exemplary impact mechanism 122, such as a rotary or rotating impact mechanism. The handheld power tool 100 has a housing 110 with a handle 126. For grid-independent power supply, the handheld power tool 100 can be mechanically and electrically connected to a power supply device for battery operation, thereby configuring the handheld power tool 100 as a battery-powered handheld power tool 100. Here, the handheld power tool battery pack 130 serves as the power supply device. However, the invention is not limited to battery-powered handheld power tools, but can also be applied to grid-connected handheld power tools, i.e., grid-operated handheld power tools or pneumatically operated handheld power tools.

[0065] The housing 110 illustratively encloses the drive unit 111 and the impact mechanism 122. Furthermore, the drive unit 111 includes an electric drive motor 114 and a transmission mechanism 118, the electric drive motor being powered by the handheld machine tool's battery pack 130. The transmission mechanism 118 may be configured as at least one planetary gear transmission mechanism. The drive motor 114 is designed such that it can be operated, for example, via a manual switch 128, allowing the drive motor 114 to be turned on and off. The drive motor 114 can be any type of motor, such as an electronically commutated motor, a brushed motor, a DC motor, or an AC motor. Advantageously, the drive motor 114 can be electronically controlled and / or regulated, thereby enabling reversible operation and a desired rotational speed. For reversible operation, the handheld machine tool 100 has a rotation direction switching element 121, configured as a rotation direction switching switch. The rotation direction switching element 121 is configured to switch the drive motor 114 between a right-hand rotation direction and a left-hand rotation direction. The structure and operation of a suitable drive motor are well known to those skilled in the art, and therefore will not be discussed in detail here.

[0066] The transmission mechanism 118 is connected to the drive motor 114 via the motor shaft 116. The transmission mechanism 118 is configured to convert the rotation of the motor shaft 116 into rotation between the transmission mechanism 118 and the impact mechanism 122 via a drive member 120, such as a drive shaft. Preferably, this conversion occurs in such a way that the drive member 120 rotates relative to the motor shaft 116 with an increased torque but a decreased rotational speed. Illustratively, the drive motor 114 is associated with a motor housing 115, just as the transmission mechanism 118 is associated with a transmission mechanism housing 119. The motor housing 115 and the transmission mechanism housing 119 are, for example, arranged within a housing 110. However, it is also conceivable that if the handheld machine tool 100 is constructed in an "open frame" configuration, the drive motor 114 and the transmission mechanism 118 can be directly arranged within the housing 110.

[0067] Impact mechanism 122 is connected to drive member 120 and exemplarily includes impact body 125, which generates impact-type rotational pulses with high intensity. These impact-type rotational pulses are transmitted via impact body 125 to driven shaft 124, such as a working spindle. Impact mechanism 122 includes impact mechanism housing 123, wherein impact mechanism 122 may also be arranged in other suitable housings, such as transmission mechanism housing 119. Exemplary impact mechanism 122 is configured to drive driven shaft 124. Tool receiver 150 is provided on driven shaft 124. Preferably, tool receiver 150 is molded and / or constructed on driven shaft 124. Preferably, tool receiver 150 is arranged along an axial direction 132 opposite to that of drive unit 111. Tool receiver 150 is configured here as an internal hexagonal receiver in the form of a bit holder, configured to receive insert tool 140. Insert tool is shaped as a screwdriver bit having a polygonal outer connector 142. The form of screwdriver bits, such as those of the HEX type, is well known to those skilled in the art. However, the invention is not limited to the use of HEX screwdriver bits, but other tool receivers that are meaningful to those skilled in the art can also be used, such as HEX drill bits, SDS-Quick insert tools, or round shank drill chucks. Furthermore, the structure and operation of suitable bit holders are well known to those skilled in the art.

[0068] The handheld power tool 100 has a housing 110, a control unit 170 for controlling at least a drive unit 111, a user interface 200, and a positioning device 300 according to the invention. The housing 110 at least partially receives at least the control unit 170 and the user interface 200. The user interface 200 includes operating elements 202 and additional operating elements 204, and a work position illumination unit 210, see also... Figure 2 See Figure 5. Operating element 202 and additional operating element 204 can receive user input. Control unit 170 has control unit circuit board 172 and control unit housing 174, also see Figure 5. Figure 2 As shown in Figure 6, the control unit housing 174 receives the control unit circuit board 172. The control unit circuit board 172 has at least one microcontroller.

[0069] Control unit 170 receives a switching signal generated when manual switch 128 is used. Furthermore, control unit 170 processes the switching signal of manual switch 128 before transmitting it to drive unit 111. Additionally, control unit 170 receives user interface signals from user interface 200. These user interface signals are generated by input from the user via operating element 202 and / or additional operating element 204. Control unit 170 processes the user interface signals into at least one output signal and outputs it. The output signal is sent to user interface 200 and / or drive unit 111.

[0070] Furthermore, the housing 110 includes a power supply retention device 160. Additionally, the user interface 200 is disposed on the power supply retention device 160, see also [reference needed]. Figure 2 The power retention unit 160 receives the handheld machine tool battery pack 130 and forms a base 162 with a support surface thereon. The handheld machine tool battery pack 130 can be detached from the power retention unit 160 without tools. Furthermore, the housing 110 has a handle 126 and the power retention unit 160. The handle 126 can be gripped by a user. In one embodiment, the power retention unit 160 is arranged on the handle 126. The handheld machine tool 100 can be placed on the base 162. In this embodiment, the user interface 200 is arranged on the power retention unit 160.

[0071] Figure 2 A three-dimensional partial view 400 of a handheld power tool 100 having a user interface 200 is shown. A housing 110 at least partially receives a control unit 170 and the user interface 200. Here, the housing 110 includes at least one receiving portion 164 (not shown in detail) for the control unit 170. The receiving portion 164 for the control unit 170 at least partially surrounds the control unit housing 174. The receiving portion 164 for the control unit 170 is exemplary configured as a rib and integrally constructed with the housing 110. Here, an operating element 202 is configured for adjusting the speed level of the drive unit 111, and a further operating element 204 is configured for adjusting the operating mode. The user interface 200 also includes a display element 230, which can display the selection of the speed level of the drive unit 111 and the adjusted operating mode.

[0072] Figure 3A cross-sectional view 410 shows a user interface 200 having a positioning device 300 and a control unit 170 according to the invention. The positioning device 300 supports the user interface 200 on the control unit housing 174. Here, the user interface 200 rests against the positioning device 300. Additionally, the positioning device 300 arranges the user interface 200 relative to the control unit housing 174 and positions the user interface 200 at a relative position. The control unit housing 174 is configured to arrange the control unit 170 within a housing 110, wherein the control unit housing 174 is formed, for example, in the form of a cup, see also... Figure 4 Up to 6.

[0073] The positioning device 300 includes at least one positioning element 310. Here, for example, two positioning elements 310 are constructed, which are pin-shaped. The positioning elements 310 are configured to arrange the user interface 200 to overlap the control unit 170 at least partially. Here, the user interface 200 overlaps the control unit housing 174 at least partially. The positioning elements 310 arrange the user interface 200 substantially parallel to the control unit 170. The positioning elements 310 are at least partially engaged with the user interface 200. Here, the user interface 200 includes at least one receiving portion 240, wherein, exemplary, two receiving portions 240 are constructed. The positioning elements 310 are at least partially engaged with the receiving portions 240. Here, the positioning elements 310 and the receiving portions 240 of the user interface 200 form a form-locking connection.

[0074] User interface 200 includes user interface circuit board 250, see also Figure 4 Referring to Figure 6, the user interface circuit board 250 has at least one through-opening 252, wherein, exemplarily, two through-openings 252 are formed. A positioning element 310 passes through the through-opening 252. The through-opening 252 is constructed here, for example, by means of a through-hole. The through-opening 252 is circularly formed. The positioning element 310 here forms a form-locking connection with the through-opening 252.

[0075] The user interface circuit board 250 includes a switching element 254 and another switching element 256. Switching element 254 and the other switching element 256 are exemplarily configured as buttons. Switching element 254 is configured to be actuated by operating element 202. The other switching element 256 is configured to be actuated by another operating element 204. The working position illumination unit 210 has at least one light-emitting element 212, which is exemplarily configured as an LED. The light-emitting element 212 is arranged on the user interface circuit board 250. Furthermore, the working position illumination unit 210 has a light guide element 214, which is exemplarily shaped as a focusing lens.

[0076] User interface 200 includes carrier element 220. Therefore, user interface 200 here includes carrier element 220 and user interface circuit board 250. Carrier element 220 has at least one receiving element 222, wherein, exemplarily, two receiving elements 222 are formed. Positioning element 310 engages with the receiving element 222 of carrier element 220. Here, positioning element 310 and receiving element 222 of carrier element 220 form a form-locking connection. Receiving element 222 here is exemplarily formed as a can-shaped receiving portion. Receiving element 222 is integrally formed with carrier element 220. Here, carrier element 220 includes display element 230, light guide element 214 of working position illumination unit 210, operating element 202, and additional operating element 204. Light guide element 214 and display element 230 are exemplarily encapsulated by injection molding through carrier element 220. Here, operating element 202 and additional operating element 204 are integrally formed with carrier element 220. Actuating element 202 and the other actuating element 204 each include a reset element 206. The reset element 206 guides actuating element 202 and the other actuating element 204 to at least one neutral position. In this neutral position, actuating element 202 and the other actuating element 204 can be manipulated. The reset element 206 is formed as at least one spring-loaded element. The reset element 206 forms a hinged lever with actuating element 202 and the other actuating element 204, respectively.

[0077] The positioning device 300 includes at least one support element 320. Here, the positioning device exemplarily has five support elements 320, see also [link to previous section]. Figure 4 Referring to Figure 6, the user interface circuit board 250 rests against the support element 320. The support element 320 is configured to direct the applied operating force into the housing 110. The support element 320 is operatively connected to and supported on the housing 110, see also Figure 6. Figure 4 Referring to Figure 6. Here, the support element 320 rests against the control unit housing 174. The control unit housing 174 is operatively connected to and rests against the housing 110, see also [reference needed]. Figure 4 To Figure 6. The five support elements 320 are here formed as two surrounding shoulders 322, two edges 324 and a protrusion 326, see also Figure 6. Figure 4 And 5. Here, the positioning element 310 and the support element 320, which is configured as a surrounding shoulder 322, are formed as one piece.

[0078] The control unit housing 174 forms a positioning device 300. Here, the control unit housing 174 is formed with a positioning element 310 and a support element 320, the support element being constructed as a surrounding shoulder 322, an edge 324, and a protrusion 326. Here, the control unit housing 174 is integral with the positioning element 310 and the support element 320.

[0079] The user interface circuit board 250 is electrically connected to the control unit circuit board 172, see also Figure 5c The user interface circuit board 250 includes at least one opening 258 for the control unit circuit board 172. The control unit circuit board 172 includes at least one pin 173 for the user interface circuit board 250. The pin 173 for the user interface circuit board 250 is configured to engage with the opening 285 for the control unit circuit board 172. Furthermore, the pin 173 for the user interface circuit board 250 is soldered to the user interface circuit board 250 via the opening 258 for the control unit circuit board 172. Here, the user interface circuit board 250 includes a plurality of openings 258 for the control unit circuit board 172, exemplarily including five openings. The control unit circuit board 172 includes a plurality of pins 173 for the user interface circuit board 250, exemplarily including five pins. The plurality of openings 258 for the control unit circuit board 172 correspond to the plurality of pins 173 for the user interface circuit board 250.

[0080] Figure 4 A longitudinal cross-sectional view 420 shows a user interface 200 having a positioning device 300 according to the invention. The positioning device 300 includes an additional positioning element 330 for centering the user interface 200 relative to a housing opening 109. The user interface 200 includes a connecting element 260. The connecting element 260 of the user interface 200 is configured to receive the additional positioning element 330. The housing 110 includes a housing opening 109, wherein the housing opening 109 is formed in a base 162 of the housing 110. The housing opening 109 is exemplary here shaped as a polygon, see also... Figure 2 The additional positioning element 330 is exemplarily configured as an O-ring here. The connecting element 260 receives the additional positioning element 330 such that the additional positioning element 330 abuts against the connecting element 260. The connecting element 260 and the additional positioning element 330 form a form-locking connection. Here, the connecting element 260 is exemplarily configured as a surrounding groove.

[0081] The positioning device 300 includes at least one limiting element 340, wherein two limiting elements 340 are configured herein. The control unit circuit board 172 rests against the limiting element 340. The limiting element 340 is configured to arrange the control unit circuit board 172 relative to the user interface 200. The limiting element 340 is exemplarily configured herein as a rib.

[0082] Here, in addition to the positioning element 310 and the support element 320, the control unit housing 174 also forms a boundary element 340. Furthermore, the control unit housing 174, the positioning element 310, the support element 320, and the boundary element 340 are integrated here.

[0083] The housing 110 protrudes at least partially from the user interface 200. The housing 110 includes a surrounding protrusion 108, see also... Figure 2 The housing 110 is configured to house the user interface 200 between the housing 110 and the control unit 170. Here, the carrier element 200 includes an operating membrane 224, see also... Figure 2 , Figure 3 and Figure 5a The operating membrane 224 has operating indicators. These indicators are configured to display information about the handheld machine tool to the user, such as speed level or operating mode. A protrusion 108 of the housing 110 protrudes from the user interface 200. The housing 110 has multiple compression ribs (not shown in detail). Force is applied to the user interface 200 via these compression ribs in a direction toward the control unit 170.

[0084] Display element 230 includes a light guide element 232 in the form of a focusing lens, at least one light-emitting element 234 configured herein as an LED, an information display element 236 in the form of a light strip, a speed level display element 235, and an operating mode display element 238, see also Figure 5a and 5c Seven light-emitting elements 234 are provided here, of which three light-emitting elements 234 are associated with the speed level display element 235, two light-emitting elements 234 are associated with the operation mode display element, and two light-emitting elements 234 are associated with the information display element 236. See [link to relevant documentation]. Figure 5c .

[0085] Figure 5a A perspective view of the carrier element 220 is shown. Figure 5b A perspective view of the control unit housing 174 is shown. Figure 5c A perspective view of a control unit circuit board 172 with a user interface circuit board 250 is shown.

[0086] Figure 6 illustrates an alternative embodiment of the positioning device 300. Here, Figure 6a A perspective sectional view of a portion 400 of a handheld power tool 100 having this alternative embodiment with positioning device 300 is shown. In this alternative embodiment, positioning element 310 at least partially surrounds user interface 200. Here, positioning element 310 at least partially surrounds user interface circuit board 250. Positioning element 310 and user interface circuit board 250 form a form-locking connection. Figure 6b A perspective view of this alternative embodiment of the positioning device 300 is shown. Here, the positioning element 310 is formed as a frame 315 that at least partially surrounds it.

Claims

1. A handheld power tool (100), said handheld power tool having: Drive unit (111), wherein, The drive unit (111) can be operated by means of at least one manual switch (128); At least a control unit (170) for controlling the drive unit (111), wherein the control unit (170) has a control unit housing (174); At least one user interface (200), wherein the user interface (200) includes at least one operating element (202); and The housing (110) of the handheld power tool, wherein the housing (110) at least partially receives the control unit (170) and the user interface (200), in, The handheld power tool (100) has a positioning device (300), wherein the user interface (200) is supported on the control unit housing (174) when using the positioning device (300). The positioning device (300) has at least one limiting element (340), and the control unit (170) includes a control unit circuit board (172), wherein the control unit circuit board (172) is abutted against the limiting element (340), and the limiting element (340) is configured to arrange the control unit circuit board (172) relative to the user interface (200).

2. The handheld machine tool (100) according to claim 1, characterized in that, The positioning device (300) has at least one positioning element (310), wherein the positioning element (310) is configured to arrange the user interface (200) to overlap the control unit (170) at least in sections.

3. The handheld machine tool (100) according to claim 2, characterized in that, The positioning element (310) is at least partially engaged with the user interface (200).

4. The handheld machine tool (100) according to claim 3, characterized in that, The user interface (200) has a user interface circuit board (250), wherein the user interface circuit board (250) includes at least one through opening (252), and the positioning element (310) is configured to pass through the through opening (252).

5. The handheld machine tool (100) according to claim 3 or 4, characterized in that, The user interface (200) has at least one carrier element (220), wherein the carrier element (220) includes at least one receiving element (222), and the positioning element (310) is engaged in the receiving element (222) of the carrier element (220).

6. The handheld machine tool (100) according to claim 3 or 4, characterized in that, The positioning element (310) is constructed in a pin-like shape.

7. The handheld machine tool (100) according to any one of claims 2 to 4, characterized in that, The positioning element (310) at least partially surrounds the user interface (200).

8. The handheld machine tool (100) according to claim 7, characterized in that, The positioning element (310) is configured as a frame (315) that at least partially surrounds it.

9. The handheld machine tool (100) according to any one of claims 1 to 4, characterized in that, The positioning device (300) has at least one support element (320, 322, 324, 326), wherein the user interface (200) rests against the support element (320, 322, 324, 326), and the support element (320, 322, 324, 326) is configured to direct the operating force to the housing (110) of the handheld machine tool.

10. The handheld machine tool (100) according to any one of claims 1 to 4, characterized in that, The positioning device (300) has an additional positioning element (330) for centering the user interface (200) relative to the housing opening (109), and the user interface (200) has a connecting element (260) configured to receive the additional positioning element (330).

11. The handheld machine tool (100) according to any one of claims 1 to 4, characterized in that, The control unit housing (174) constitutes the positioning device (300).

12. The handheld machine tool (100) according to any one of claims 1 to 4, characterized in that, The user interface (200) is electrically connected to the control unit (170).

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